Assignation Ridge Roadless Area


 
 

Adoption Status: ADOPTED

13,266 acres (20.7 square miles)

How to get there
Assignation Ridge RA is located 6 miles south of Carbondale, and just NW of Redstone.

  • From Carbondale take State Highway (SH) 133 to the south. The Perham Creek Trail begins on the west side of the highway about 3 miles south of the forest boundary. This trail crosses Assignation Ridge to South Thompson Creek.
  • From Redstone, turn west on FS 307 toward Coal Basin. About 3 miles up this road is the Braderich Creek trailhead (1952) on the right. This trail goes north to South Thompson Creek, and is the western boundary of the unit.
  • The USGS 7 1/2’ quads for Assignation Ridge RA are Stony Ridge, Mount Sopris, Placita, and Redstone.

Setting
Assignation Ridge RA sits on the divide between the Crystal River and South Thompson Creek. The bulk of the unit consists of rolling hills and craggy drainages covered in diverse plant communities. These include aspen, mountain shrubs, sagebrush, Gambel oak, Douglas fir, and pinyon/juniper. The precipitous slopes near the eastern boundary of the unit display enormous red sandstone cliffs that tower over the Crystal River valley, and give Redstone its name. The elevation ranges from 6,700 feet at the Crystal River to 10,614 feet on the divide.

What’s special about it?
This unit, despite its proximity to the Town of Carbondale, is very undisturbed, and retains a wild and natural quality. The area is well-known for its large diversity of plant communities, and has been proposed to be a Research Natural Area by the Colorado Natural Heritage Program (CNHP). The RA also contains part of CNHP’s Middle Thompson Creek Potential Conservation Area, and is adjacent to the Smith Gulch Potential Conservation Area.

Assignation Ridge RA is part of a critical big game migration corridor between the Maroon Bells/Snowmass Wilderness and the Thompson Creek roadless complex. It also provides access to lower elevation winter range on BLM roadless land to the north.

The Crystal River has been proposed to be Wild & Scenic River, and the Assignation Ridge area provides a significant scenic backdrop to this valley. Trails in the area are popular with hikers and horseback riders, and a moderate amount of elk hunters are present in the fall. There are also popular ice climbing areas on the sandstone cliffs along the Crystal River.

The WRNF recommended this area for wilderness designation in the 2002 Revised Forest Plan and is being managed to not impair its wilderness qualities until Congress acts on this recommendation. Until then, the area’s Recommended Wilderness status could easily be changed to a zoning that allows ecologically damaging activities like natural gas development and timber harvest.

Potential threats
The primary threat to this area is illegal motorized incursion from public and private lands to the NW of the unit. Oil and gas exploration could alter the character of this area.

Other info
There are two active cattle allotments in the unit. The Assignation Ridge RA is contiguous with an 8,148 acre roadless section of BLM lands to the north, near Carbondale. In addition, conservation groups have identified 4,398 more acres of roadless area adjacent to the SW portion of the unit. The total size of this roadless complex is 25,812 acres (40.3 square miles).



 
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